Stop us if you've heard this before: Charlie Sheen is causing problems on set of his TV show.The "Anger Management" star is stirring up some major drama for his FX show as he hasn't been showing up for work, THR reports. Sheen missed several days of work in recent weeks, causing the show's studio Lionsgate to delay production. The show has been using stand-ins for the actor in his absence, but that can only go so far.Since Sheen knows that "Anger Management" can't go on without him, he's not worried, but his co-stars are getting fed up. According to one source, the rest of the cast is threatening to stop working if Sheen keeps this up.However, according to Sheen's publicist Jeff Ballard, the show has not used stand-ins or shot around the actor. "We did not shoot last week because another member of the cast was sick," Ballard says. "Charlie is always ready, willing and able to shoot 'Anger Management' and looks forward to returning on Monday."Since this isn't the first time Sheen has caused problems on set -- he infamously was let go from "Two and a Half Men" after his substance abuse problems -- many are wondering if FX and Lionsgate made the right call by ordering 90 episodes of "Anger Management" after the first season. The series is about two thirds of the way done shooting, and is scheduled to finish this fall. While these current delays are not expected to affect the end date, the ball is in Sheen's court.